I have a Shell credit card that saves me a certain percentage on gas.
I occasionally get coupons in the mail or email for 5 cents off per gallon.
Thursdays are 5 cents off per gallon at all Shell stations.
Giant Food has a partnership program with Shell where you can save 10 cents or more per gallon based on the amount of groceries you buy.

I normally use Rutters gas stations around here and I have their Rutters rewards card. When I'm working, I normally go there to buy lunch, snacks, and drinks. I normally save .30-.40 cents a gallon by the time I use the rewards. But, then again I don't drive as much lately because I use my work van for work. But, it still helps when I do fill up.

Giant Food around here also does the same thing. They will let you save cents off a gallon for purchases of groceries at their stores. My mom does that to save money on her card and my gf does it on our card. It also helps to use Apps like poynt or gas buddy on your smart phone. Those apps will show you the cheapest place around your zip code to fill up if you don't have reward programs. Believe me, 10 mins away from me. There was a gas station selling premium for almost .30 less then the one down the street from me. It all helps you save money.

they have a 1 GAL fuel tank, so you get 100+ miles per tank, and there is a healthy aftermarket for them, one of the guys at my work has a bored and stroked turbo ruck and has hit 90+ MPH and still gets well over 70MPG